PROBLEM TO BE SOLVED: To provide a working vehicle equipped with automatic steering that can improve safety of an operator.SOLUTION: The working vehicle includes a travelling vehicle body 2 travelling in a farm field, a steering member for steering the travelling vehicle body 2, an operation detection member for detecting an operation of the steering member, an inclination detection member 39 for detecting an inclination of the machine body of the travelling vehicle body 2, and a control part C for executing straight-travel control for the travelling vehicle body 2 by causing the steering member 17 to perform automatic steering according to an inclination direction when an inclination of a predetermined angle or more is detected by the inclination detection member 39, and further includes an internal combustion engine control device 18 for controlling the output of an internal combustion engine 4, and vehicle speed regulation means for regulating the speed of the working vehicle 2. When an operation of the steering member 17 is not detected for a predetermined time during the straight-travel control, the control part C regulates the vehicle speed by the vehicle speed regulation means. If the operation is not detected for a predetermined time after the regulation of the vehicle speed, the control part C controls the internal combustion engine control device 18, and stops the internal combustion engine, thereby improving safety of an operator.SELECTED DRAWING: Figure 4【課題】自動操舵を備えた作業車両において、作業者の安全性を向上できる作業車両を提供する。【解決手段】 圃場を走行する走行車体2と、走行車体2を操舵操作する操舵部材と、操舵部材の操作を検出する操作検出部材と、走行車体2の機体の傾斜を検知する傾斜検知部材39と、前記傾斜検知部材39により所定角度以上の傾斜が検知されると傾斜方向に応じて前記操舵部材17を自動操舵することで前記走行車体2を直進制御する制御部Cとを備える作業車両において、内燃機関4の出力を制御する内燃機関制御装置18と、作業車両2の車速を規制する車速規制手段とをさらに備え、制御部Cは、直進制御中に所定時間前記操舵部材17の操作が検出されない場合、前記車速規制手段によって、車速を規制するとともに、車速規制後さらに、所定時間操作が検出されない場合、内燃機関制御装置18を制御して、内燃機関を停止するよう構成し、作業者の安全性を向上する。【選択図】 図4
